[INFO] cloning repository https://github.com/phlopsi/neat-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/phlopsi/neat-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphlopsi%2Fneat-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphlopsi%2Fneat-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7e9f91c877c2beadc6239246192579f9ab29329d
[INFO] documenting phlopsi/neat-rs against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphlopsi%2Fneat-rs" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/phlopsi/neat-rs on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config
[INFO] removed /workspace/builds/worker-6/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/phlopsi/neat-rs
[INFO] finished tweaking git repo https://github.com/phlopsi/neat-rs
[INFO] tweaked toml for git repo https://github.com/phlopsi/neat-rs written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/phlopsi/neat-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 80e29d738a6dddda6affd90bd92fe00c9fa7505ae3d69e96331c2b3e374f0ebb
[INFO] running `Command { std: "docker" "start" "-a" "80e29d738a6dddda6affd90bd92fe00c9fa7505ae3d69e96331c2b3e374f0ebb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80e29d738a6dddda6affd90bd92fe00c9fa7505ae3d69e96331c2b3e374f0ebb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80e29d738a6dddda6affd90bd92fe00c9fa7505ae3d69e96331c2b3e374f0ebb", kill_on_drop: false }`
[INFO] [stdout] 80e29d738a6dddda6affd90bd92fe00c9fa7505ae3d69e96331c2b3e374f0ebb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 209e2e9910fd828e9d3e02a8b8c3a029e9c07b85a5e9389d2deab6d6c06b2841
[INFO] running `Command { std: "docker" "start" "-a" "209e2e9910fd828e9d3e02a8b8c3a029e9c07b85a5e9389d2deab6d6c06b2841", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling arraydeque v0.4.5
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rustc-hash v1.0.1
[INFO] [stderr]  Documenting neat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `neat`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name neat src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=d2e25812f2c3236e -L dependency=/opt/rustwide/target/debug/deps --extern arraydeque=/opt/rustwide/target/debug/deps/libarraydeque-f5b77ac742f0cea4.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-34628d18bd87ac14.rmeta --extern rustc_hash=/opt/rustwide/target/debug/deps/librustc_hash-2fa9a7409614baf2.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "209e2e9910fd828e9d3e02a8b8c3a029e9c07b85a5e9389d2deab6d6c06b2841", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "209e2e9910fd828e9d3e02a8b8c3a029e9c07b85a5e9389d2deab6d6c06b2841", kill_on_drop: false }`
[INFO] [stdout] 209e2e9910fd828e9d3e02a8b8c3a029e9c07b85a5e9389d2deab6d6c06b2841